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A Modification Method for Improving Formaldehyde Adsorption Performance of Honeycomb Ceramics

A technology of honeycomb ceramics and formaldehyde adsorption, applied in chemical instruments and methods, other chemical processes, etc., to achieve the effects of fast adsorption rate, cheap and easy-to-obtain reagents, and simple and easy modification methods

Active Publication Date: 2015-09-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the use of honeycomb ceramics as an adsorbent for removing formaldehyde gas and related modification methods to improve its ability to adsorb formaldehyde.

Method used

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  • A Modification Method for Improving Formaldehyde Adsorption Performance of Honeycomb Ceramics
  • A Modification Method for Improving Formaldehyde Adsorption Performance of Honeycomb Ceramics
  • A Modification Method for Improving Formaldehyde Adsorption Performance of Honeycomb Ceramics

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Experimental program
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Effect test

Embodiment 1

[0027] Modification method of honeycomb ceramics

[0028] 1. Immerse commercially available honeycomb ceramics in a 1M NaOH solution at room temperature;

[0029] 2. Immerse the honeycomb ceramics in the NaOH solution in step 1, take them out after 30 minutes, and dry them in the air to obtain the modified honeycomb ceramic formaldehyde adsorbent.

[0030] Photographs, XRD and SEM of honeycomb ceramics and commercially available honeycomb ceramics after embodiment 1 modification are as figure 1 , figure 2 , image 3 Figure 4 and Figure 5 shown. From figure 1 , figure 2 It can be seen that, compared with the commercially available honeycomb ceramics, the color of the modified honeycomb ceramics becomes pale yellow. From image 3 It can be observed that the commercially available honeycomb ceramics and the modified honeycomb ceramics have similar XRD diffraction peaks, and there is no obvious phase difference, mainly Al2O3. From Figure 4 , Figure 5 It can be ob...

Embodiment 2

[0032] Modification method of honeycomb ceramics

[0033] 1. Immerse commercially available honeycomb ceramics in a 0.1M NaOH solution at room temperature;

[0034] 2. Immerse the honeycomb ceramics in the NaOH solution in step 1, take them out after 30 minutes, and dry them in the air to obtain the modified honeycomb ceramic formaldehyde adsorbent.

Embodiment 3

[0036] Modification method of honeycomb ceramics

[0037] 1 Immerse commercially available honeycomb ceramics in a 0.5M NaOH solution at room temperature;

[0038] 2. Immerse the honeycomb ceramics in the NaOH solution in step 1, take them out after 30 minutes, and dry them in the air to obtain the modified honeycomb ceramic formaldehyde adsorbent.

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Abstract

The invention provides a modification method for improving oxymethylene adsorbing property of honeycomb ceramics. The modification method comprises the following steps of: soaking commercial available honeycomb ceramics in an alkaline solution, carrying out alkaline corrosion treatment, and airing to obtain the modified honeycomb ceramics capable of efficiently adsorbing oxymethylene, wherein the alkaline solution is one or more of ammonia water, sodium hydroxide, potassium hydroxide and calcium hydroxide, the concentration of the alkaline solution is 0.01-13 M, the soaking temperature is 10-15 DEG C, and the soaking time is 10-1440 minutes. The modification method provided by the invention utilizes a simple alkali treatment method so as to manufacture an efficient modified adsorbent for the honeycomb ceramics oxymethylene; under room temperature, the adsorption capacity of the obtained modified honeycomb ceramics to the oxymethylene in the air can reach 135ppm, the adsorption rate is high, and the activity of the obtained modified honeycomb ceramics is basically stable during repeated use for a plurality of times of the obtained modified honeycomb ceramics; and the modification method is simple and feasible, the required reagent is cheap and easily available, and the modification method is suitable for industrial production.

Description

technical field [0001] The invention relates to a modification method for improving the formaldehyde absorption performance of honeycomb ceramics, which belongs to the fields of material processing and indoor air purification. Background technique [0002] Formaldehyde is a typical indoor pollutant and has been listed as a possible carcinogen. It mainly comes from building materials and interior decoration materials. At lower concentrations, formaldehyde mainly causes bronchitis, pneumonia, asthma or dermatitis etc. to the health impact. When the concentration is greater than 15ppm, formaldehyde can cause death. Because people spend most of their time in indoor places, such as living places, workplaces, hospitals and schools. Therefore, purifying indoor air and removing formaldehyde pollution has become an urgent task to improve people's health and improve people's living environment. [0003] At present, the methods for controlling indoor formaldehyde pollution mainly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/32B01D53/02
Inventor 余家国徐志花李昕扬程蓓
Owner WUHAN UNIV OF TECH